201061921 has 2 divisors, whose sum is σ = 201061922. Its totient is φ = 201061920.

The previous prime is 201061853. The next prime is 201061969. The reversal of 201061921 is 129160102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115240225 + 85821696 = 10735^2 + 9264^2 .

It is a cyclic number.

It is not a de Polignac number, because 201061921 - 2⁹ = 201061409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201061892 and 201061901.

It is not a weakly prime, because it can be changed into another prime (201067921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100530960 + 100530961.

It is an arithmetic number, because the mean of its divisors is an integer number (100530961).

Almost surely, 2^201061921 is an apocalyptic number.

It is an amenable number.

201061921 is a deficient number, since it is larger than the sum of its proper divisors (1).

201061921 is an equidigital number, since it uses as much as digits as its factorization.

201061921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 201061921 is about 14179.6304958909. The cubic root of 201061921 is about 585.8367464488.

The spelling of 201061921 in words is "two hundred one million, sixty-one thousand, nine hundred twenty-one".